If `(x^2+x)+i ya n d(-x-1)-i(x+2y)` are conjugate of each other, then real value of `x&y` are `x=-1,y=1` b. `x=1,y=-1` c. `x=1,y=1` d. `x=-1,y=-1`

If det|6i -3i 1 4 3i-1 20 3 i|=x+i y , then a. x=3,y=1 b. x=1,y=3 c. x=0,y=3 d. x=0,y=0

Find the real values of x\ a n d\ y ,\ if:(1+i)(x+i y)=2-5i

If |[6i,-3i,1],[ 4, 3i,-1],[ 20, 3,i]|=x+i y , then a. x=3,y=1 b. x=1,y=3 c. x=0,y=3 d. x=0,y=0

If x,y are real numbers such that 3^((x)/(y)+1) -3^((x)/(y)-1) = 24 , then the value of (x+y)//(x-y) is:-

If x+y+z=1,\ x y+y z+z x=-1\ \ a n d\ x y z=-1, find the value of x^3+y^3+z^3

If A(x_1, y_1),B(x_2, y_2),C(x_3, y_3) are the vertices of a triangle, then the equation |x y1x_1y_1 1x_2y_3 1|+|x y1x_1y_1 1x_3y_3 1|=0 represents (a)the median through A (b)the altitude through A (c)the perpendicular bisector of B C (d)the line joining the centroid with a vertex

If x\ a n d\ y are co-primes, then their LCM is (a)1 (b) x/y (c) x y (d) None of these

|(3,-3i,x),(4,y,i),(0,2i,-i)|=18+11i is true of (A) x=1,y=2 (B) x=1,y=-1 (C) x=-1,y=1 (D) x=0,y=3

If (x_1, y_1) be the centroid of the triangle formed by a line L and coordinate axes then equation of line L is a. (3x)/(x_1)+(3y)/(y_1)=1 b. xx_1+y y_1=3 c. x/(3x_1)+y/(3y_1)=1 d. x/(x_1)+y/(y_1)=1 e. x x_1+y y_1=1

If y^(1/n)+y^(-1/n) = 2x then (x^2-1)y_2+xy_1 is equal to